Father's Day - what to do?

I want to help the kids do something nice for their dad, my ex.My eldest especially was so upset on Mother's Day they hadn't got me anything or planned anything, so for them I want to do something but what?? Any ideas? They are primary aged

Moonpig card and personalised mug. Not much effort required from you but they will enjoy choosing the card and photos and it is sufficient effort that he will hopefully feel like a total arse for not doing anything on mother's day for you.

Lelly's idea sounds great and it's something they can really get involved in.

Sorry you didn't get treats on Mother's Day. That is rubbish for you and for them but hopefully the effort you all put in this weekend will pay off next year and your ex will remember to help them make the day special.